红麻纤维增强弗洛纶/氢氧化镁生物复合材料的熔体体积流动速率和熔体流动速率

Melt volume flow rate and melt flow rate of kenaf fibre reinforced Floreon/magnesium hydroxide biocomposites.

作者信息

Lee C H, Sapuan S M, Lee J H, Hassan M R

机构信息

Department of Mechanical Engineering, The University of Sheffield, Sheffield, S1 3JD UK ; Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor Malaysia.

Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor Malaysia ; Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, 43400 Serdang, Selangor Malaysia.

出版信息

Springerplus. 2016 Sep 29;5(1):1680. doi: 10.1186/s40064-016-3044-1. eCollection 2016.

DOI:10.1186/s40064-016-3044-1

PMID:27733982

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5042909/

Abstract

A study of the melt volume flow rate (MVR) and the melt flow rate (MFR) of kenaf fibre (KF) reinforced Floreon (FLO) and magnesium hydroxide (MH) biocomposites under different temperatures (160-180 °C) and weight loadings (2.16, 5, 10 kg) is presented in this paper. FLO has the lowest values of MFR and MVR. The increment of the melt flow properties (MVR and MFR) has been found for KF or MH insertion due to the hydrolytic degradation of the polylactic acid in FLO. Deterioration of the entanglement density at high temperature, shear thinning and wall slip velocity were the possible causes for the higher melt flow properties. Increasing the KF loadings caused the higher melt flow properties while the higher MH contents created stronger bonding for higher macromolecular chain flow resistance, hence lower melt flow properties were recorded. However, the complicated melt flow behaviour of the KF reinforced FLO/MH biocomposites was found in this study. The high probability of KF-KF and KF-MH collisions was expected and there were more collisions for higher fibre and filler loading causing lower melt flow properties.

摘要

本文介绍了在不同温度（160 - 180°C）和重量负荷（2.16、5、10千克）下，红麻纤维（KF）增强弗洛纶（FLO）和氢氧化镁（MH）生物复合材料的熔体体积流动速率（MVR）和熔体流动速率（MFR）的研究。FLO的MFR和MVR值最低。由于FLO中聚乳酸的水解降解，发现KF或MH插入后熔体流动性能（MVR和MFR）有所增加。高温下缠结密度的恶化、剪切变稀和壁面滑移速度是熔体流动性能较高的可能原因。增加KF含量会导致熔体流动性能提高，而较高的MH含量会形成更强的键合，从而使大分子链流动阻力更大，因此记录到的熔体流动性能较低。然而，本研究发现KF增强的FLO/MH生物复合材料具有复杂的熔体流动行为。预计KF - KF和KF - MH碰撞的可能性很高，并且对于较高的纤维和填料负载，碰撞更多，导致熔体流动性能较低。